Wow. Thanks, but I wish I had known that a week ago. It would have saved a huge amount of time trying to make my new 2017 charts match my existing 2012 ones. Why would something like that be changed? Was that change documented anywhere? I didn't see it in the Release.txt file. If it is in there, it ...

I figured it out... After replacing the 2017 TChart.dll with the old 2012 TChart.dll, the program compiled and ran file since all of the existing charts were originally from that package. I noticed that the charts in the toolbox (that I tried to drop on the form) were still 2016/2017. I deleted thos...

Thanks for the response. I finally gave up yesterday and reverted back to NET2012. My project compiles, but now I cannot add any new charts. This error message appears when I try to drop a chart on my form.